The thesis that free banking laws lowered barriers to entry in the U.S. banking industry is tested by examining entry of firms and output of banking services before and after the institution of free banking. The output of banking services and the number of banks remained the same or declined after the institution of free banking, in all states with viable free banking laws except New York. In light of this evidence, the belief that free banking in the antebellum United States increased competition and efficiency of the banking industry by lowering barriers to entry must be reconsidered.